拟南芥
野生型
光周期性
细胞生物学
渗透性休克
生物
发起人
拟南芥
脱落酸
抄写(语言学)
转录因子
功能(生物学)
非生物胁迫
突变体
遗传学
调节器
转录调控
基因
基因表达
植物
语言学
哲学
作者
Naizhi Chen,Xiuqing Zhang,Pengcheng Wei,Qijun Chen,Fei Ren,Jia Chen,Xuechen Wang
标识
DOI:10.5483/bmbrep.2007.40.6.1083
摘要
The HAP complex has been found in many eukaryotic organisms. HAP recognizes the CCAAT box present in the promoters of 30% of all eukaryotic genes. The HAP complex consists of three subunits--HAP2, HAP3 and HAP5. In this paper, we report the biological function of the AtHAP3b gene that encodes one of the HAP3 subunits in Arabidopsis. Compared with wild-type plants, hap3b-1 and hap3b-2 mutants exhibited a delayed flowering time under long-day photoperiod conditions. Moreover, the transcription levels of FT were substantially lower in the mutants than in the wild-type plants. These results imply that AtHAP3b may function in the control of flowering time by regulating the expression of FT in Arabidopsis. In a subsequent study, AtHAP3b was found to be induced by osmotic stress. Under osmotic stress conditions, the hap3b-1 and hap3b-2 mutants flowered considerably later than the wild-type plants. These results suggest that the AtHAP3b gene plays more important roles in the control of lowering under osmotic stress in Arabidopsis.
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